CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > General Forums > Main CFD Forum

Using Darcy Pressure equation to verify ABAQUS CFD laminar flow analysis

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 30, 2019, 11:04
Question Using Darcy Pressure equation to verify ABAQUS CFD laminar flow analysis
  #1
New Member
 
Merseyside
Join Date: Apr 2019
Posts: 1
Rep Power: 0
Chris1234 is on a distinguished road
Hello - can anybody help me on this please ? I am modelling a simple cylinder with laminar flow in ABAQUS CFD. I am using Reynolds number of 25 to simulate laminar flow with an inlet velocity of 1m/s using a fluid with density of 1 and kinematic viscosity of 0.012. I have worked out the length of the pipe as 0.375 to allow for full flow so just to add extra length I've gone to 0.562 for the length of pipe. So far so good - I've done a mesh convergence for the velocity and have a good velocity profile to display laminar flow with a max velocity in the centre as 1.98 m/s. I am now trying to do some verification regarding the pressure drop so I have looked at the contours for pressure and my CFD is giving me a value of 6.14; I am using Darcys equation of deltaP = f*(L/D)*(rho*v^2)/2 to calculate analytical - using 64/25 (i.e. 64/Re) for f, L=0.562,D=0.3 (hydraulic diameter), rho and v both equal to 1, which gives a value of 2.398. So analytical is very different to the CFD - what am I doing wrong ? Any help would be greatly appreciated. I have tried making the pipe longer but this just gives the same proportionality for the difference in the results - thank
Chris1234 is offline   Reply With Quote

Reply

Tags
cylinder laminar, darcy, flow, pressure


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Issues on the simulation of high-speed compressible flow within turbomachinery dowlee OpenFOAM Running, Solving & CFD 11 August 6, 2021 07:40
CFD Salary CFD Main CFD Forum 17 January 3, 2017 18:09
pulsatile blood flow - developing larger pressure in the fluid domain KushalJ CFX 4 April 29, 2015 01:14
CFD Online Celebrates 20 Years Online jola Site News & Announcements 22 January 31, 2015 01:30
Hydrostatic pressure in 2-phase flow modeling (long) DS & HB Main CFD Forum 0 January 8, 2000 16:00


All times are GMT -4. The time now is 22:05.